/**
 * BeanUtil.java
 * 
 * Create Version: 1.0
 * Author: 徐舟骏
 * Create Date: 2012-5-9
 */
package ysyh55.android.base.util;

import java.lang.reflect.Field;
import java.lang.reflect.Modifier;

import android.util.Log;

/**
 * BeanUtil 实体类操作工具类
 * 
 * @author 徐舟骏
 */
public class BeanUtils {
	private static final String TAG = "BeanUtil";

	private BeanUtils() {
	}

	/**
	 * 
	 * 直接设置对象属性值,无视private/protected修饰符,不经过setter函数.
	 */
	public static void setFieldValue(final Object object, final String fieldName, final Object value) {
		Field field = getDeclaredField(object, fieldName);
		if (field == null) {
			throw new IllegalArgumentException("Could not find field [" + fieldName + "] on target [" + object + "]");
		}

		makeAccessible(field);
		try {
			field.set(object, value);
		} catch (IllegalAccessException e) {
			Log.e(TAG, "", e);
		}
	}

	/**
	 * 
	 * 循环向上转型,获取对象的DeclaredField.
	 */
	protected static Field getDeclaredField(final Object object, final String fieldName) {
		return getDeclaredField(object.getClass(), fieldName);
	}

	/**
	 * 
	 * 循环向上转型,获取类的DeclaredField.
	 */
	protected static Field getDeclaredField(final Class<?> clazz, final String fieldName) {
		for (Class<?> superClass = clazz; superClass != Object.class; superClass = superClass.getSuperclass()) {
			try {
				return superClass.getDeclaredField(fieldName);
			} catch (NoSuchFieldException e) {
				// Field不在当前类定义,继续向上转型
			}
		}
		return null;
	}

	/**
	 * 
	 * 强制转换fileld可访问.
	 */
	protected static void makeAccessible(Field field) {
		if (!Modifier.isPublic(field.getModifiers()) || !Modifier.isPublic(field.getDeclaringClass().getModifiers())) {
			field.setAccessible(true);
		}
	}
}
